<template>
  <div v-transfer-dom :data-transfer="transfer">
    <transition :name="transitionNames[1]">
      <div :class="maskClasses" v-show="visible" @click="mask"></div>
    </transition>
    <div :class="wrapClasses" @click="handleWrapClick">
      <transition :name="transitionNames[0]" @after-leave="animationFinish">
        <div :class="classes" :style="mainStyles" v-show="visible">
          <div :class="[prefixCls + '-content']">
            <a :class="[prefixCls + '-close']" v-if="closable" @click="close">
              <slot name="close">
                <Icon type="ios-close-empty"></Icon>
              </slot>
            </a>
            <div :class="[prefixCls + '-header']" v-if="showHead">
              <slot name="header">
                <div :class="[prefixCls + '-header-inner']">{{ title }}</div>
              </slot>
            </div>
            <div :class="[prefixCls + '-body']">
              <slot></slot>
            </div>
            <div :class="[prefixCls + '-footer']" v-if="!footerHide">
              <slot name="footer">
                <i-button type="text" size="large" @click.native="cancel">{{ localeCancelText }}</i-button>
                <i-button
                  type="primary"
                  size="large"
                  :loading="buttonLoading"
                  @click.native="ok"
                >{{ localeOkText }}</i-button>
              </slot>
            </div>
          </div>
        </div>
      </transition>
    </div>
  </div>
</template>
<script>
import Icon from "../icon";
import iButton from "../button/button.vue";
import TransferDom from "../../directives/transfer-dom";
import Locale from "../../mixins/locale";
import Emitter from "../../mixins/emitter";
import ScrollbarMixins from "./mixins-scrollbar";

const prefixCls = "ivu-modal";

export default {
  name: "Modal",
  mixins: [Locale, Emitter, ScrollbarMixins],
  components: { Icon, iButton },
  directives: { TransferDom },
  props: {
    value: {
      type: Boolean,
      default: false
    },
    closable: {
      type: Boolean,
      default: true
    },
    maskClosable: {
      type: Boolean,
      default: true
    },
    title: {
      type: String
    },
    width: {
      type: [Number, String],
      default: 520
    },
    okText: {
      type: String
    },
    cancelText: {
      type: String
    },
    loading: {
      type: Boolean,
      default: false
    },
    styles: {
      type: Object
    },
    className: {
      type: String
    },
    // for instance
    footerHide: {
      type: Boolean,
      default: false
    },
    scrollable: {
      type: Boolean,
      default: false
    },
    transitionNames: {
      type: Array,
      default() {
        return ["ease", "fade"];
      }
    },
    transfer: {
      type: Boolean,
      default: true
    }
  },
  data() {
    return {
      prefixCls: prefixCls,
      wrapShow: false,
      showHead: true,
      buttonLoading: false,
      visible: this.value
    };
  },
  computed: {
    wrapClasses() {
      return [
        `${prefixCls}-wrap`,
        {
          [`${prefixCls}-hidden`]: !this.wrapShow,
          [`${this.className}`]: !!this.className
        }
      ];
    },
    maskClasses() {
      return `${prefixCls}-mask`;
    },
    classes() {
      return `${prefixCls}`;
    },
    mainStyles() {
      let style = {};

      const width = parseInt(this.width);
      const styleWidth = {
        width: width <= 100 ? `${width}%` : `${width}px`
      };

      const customStyle = this.styles ? this.styles : {};

      Object.assign(style, styleWidth, customStyle);

      return style;
    },
    localeOkText() {
      if (this.okText === undefined) {
        return this.t("i.modal.okText");
      } else {
        return this.okText;
      }
    },
    localeCancelText() {
      if (this.cancelText === undefined) {
        return this.t("i.modal.cancelText");
      } else {
        return this.cancelText;
      }
    }
  },
  methods: {
    close() {
      this.visible = false;
      this.$emit("input", false);
      this.$emit("on-cancel");
    },
    mask() {
      if (this.maskClosable) {
        this.close();
      }
    },
    handleWrapClick(event) {
      // use indexOf,do not use === ,because ivu-modal-wrap can have other custom className
      const className = event.target.getAttribute("class");
      if (className && className.indexOf(`${prefixCls}-wrap`) > -1) this.mask();
    },
    cancel() {
      this.close();
    },
    ok() {
      if (this.loading) {
        this.buttonLoading = true;
      } else {
        this.visible = false;
        this.$emit("input", false);
      }
      this.$emit("on-ok");
    },
    EscClose(e) {
      if (this.visible && this.closable) {
        if (e.keyCode === 27) {
          this.close();
        }
      }
    },
    animationFinish() {
      this.$emit("on-hidden");
    }
  },
  mounted() {
    if (this.visible) {
      this.wrapShow = true;
    }

    let showHead = true;

    if (this.$slots.header === undefined && !this.title) {
      showHead = false;
    }

    this.showHead = showHead;

    // ESC close
    document.addEventListener("keydown", this.EscClose);
  },
  beforeDestroy() {
    document.removeEventListener("keydown", this.EscClose);
    this.removeScrollEffect();
  },
  watch: {
    value(val) {
      this.visible = val;
    },
    visible(val) {
      if (val === false) {
        this.buttonLoading = false;
        this.timer = setTimeout(() => {
          this.wrapShow = false;
          this.removeScrollEffect();
        }, 300);
      } else {
        if (this.timer) clearTimeout(this.timer);
        this.wrapShow = true;
        if (!this.scrollable) {
          this.addScrollEffect();
        }
      }
      this.broadcast("Table", "on-visible-change", val);
      this.broadcast("Slider", "on-visible-change", val); // #2852
      this.$emit("on-visible-change", val);
    },
    loading(val) {
      if (!val) {
        this.buttonLoading = false;
      }
    },
    scrollable(val) {
      if (!val) {
        this.addScrollEffect();
      } else {
        this.removeScrollEffect();
      }
    },
    title(val) {
      if (this.$slots.header === undefined) {
        this.showHead = !!val;
      }
    }
  }
};
</script>
